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<div class="title">vgabasecontroller.cpp</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">  Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - &lt;http://www.fabgl.com&gt;</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">  Copyright (c) 2019-2020 Fabrizio Di Vittorio.</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">  All rights reserved.</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">  This file is part of FabGL Library.</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">  FabGL is free software: you can redistribute it and/or modify</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">  it under the terms of the GNU General Public License as published by</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">  the Free Software Foundation, either version 3 of the License, or</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">  (at your option) any later version.</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">  FabGL is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">  but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment">  GNU General Public License for more details.</span></div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment">  You should have received a copy of the GNU General Public License</span></div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment">  along with FabGL.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;</div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;</div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;</div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#include &lt;alloca.h&gt;</span></div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="preprocessor">#include &lt;stdarg.h&gt;</span></div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="preprocessor">#include &lt;math.h&gt;</span></div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="preprocessor">#include &lt;string.h&gt;</span></div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="preprocessor">#include &quot;freertos/FreeRTOS.h&quot;</span></div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor">#include &quot;freertos/task.h&quot;</span></div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="preprocessor">#include &quot;soc/i2s_struct.h&quot;</span></div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor">#include &quot;soc/i2s_reg.h&quot;</span></div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="preprocessor">#include &quot;driver/periph_ctrl.h&quot;</span></div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="preprocessor">#include &quot;rom/lldesc.h&quot;</span></div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor">#include &quot;soc/rtc.h&quot;</span></div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="fabutils_8h.html">fabutils.h</a>&quot;</span></div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="swgenerator_8h.html">devdrivers/swgenerator.h</a>&quot;</span></div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="vgabasecontroller_8h.html">dispdrivers/vgabasecontroller.h</a>&quot;</span></div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacefabgl.html">fabgl</a> {</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;VGABaseController::VGABaseController()</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;{</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;}</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="keywordtype">void</span> VGABaseController::init()</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;{</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;  m_DMABuffers                   = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;  m_DMABuffersCount              = 0;</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;  m_DMABuffersHead               = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;  m_DMABuffersVisible            = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;  m_primitiveProcessingSuspended = 1; <span class="comment">// &gt;0 suspended</span></div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;  m_isr_handle                   = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;  m_doubleBufferOverDMA          = <span class="keyword">false</span>;</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;  m_GPIOStream.begin();</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;}</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;<span class="comment">// initializer for 8 colors configuration</span></div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="keywordtype">void</span> VGABaseController::begin(gpio_num_t redGPIO, gpio_num_t greenGPIO, gpio_num_t blueGPIO, gpio_num_t HSyncGPIO, gpio_num_t VSyncGPIO)</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;{</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;  init();</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;  <span class="comment">// GPIO configuration for bit 0</span></div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;  setupGPIO(redGPIO,   VGA_RED_BIT,   GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;  setupGPIO(greenGPIO, VGA_GREEN_BIT, GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;  setupGPIO(blueGPIO,  VGA_BLUE_BIT,  GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;  <span class="comment">// GPIO configuration for VSync and HSync</span></div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;  setupGPIO(HSyncGPIO, VGA_HSYNC_BIT, GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;  setupGPIO(VSyncGPIO, VGA_VSYNC_BIT, GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;  RGB222::lowBitOnly = <span class="keyword">true</span>;</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;  m_bitsPerChannel = 1;</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;}</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="comment">// initializer for 64 colors configuration</span></div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="keywordtype">void</span> VGABaseController::begin(gpio_num_t red1GPIO, gpio_num_t red0GPIO, gpio_num_t green1GPIO, gpio_num_t green0GPIO, gpio_num_t blue1GPIO, gpio_num_t blue0GPIO, gpio_num_t HSyncGPIO, gpio_num_t VSyncGPIO)</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;{</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;  begin(red0GPIO, green0GPIO, blue0GPIO, HSyncGPIO, VSyncGPIO);</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;  <span class="comment">// GPIO configuration for bit 1</span></div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;  setupGPIO(red1GPIO,   VGA_RED_BIT + 1,   GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;  setupGPIO(green1GPIO, VGA_GREEN_BIT + 1, GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;  setupGPIO(blue1GPIO,  VGA_BLUE_BIT + 1,  GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;  RGB222::lowBitOnly = <span class="keyword">false</span>;</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;  m_bitsPerChannel = 2;</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;}</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;<span class="comment">// initializer for default configuration</span></div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;<span class="keywordtype">void</span> VGABaseController::begin()</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;{</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;  begin(GPIO_NUM_22, GPIO_NUM_21, GPIO_NUM_19, GPIO_NUM_18, GPIO_NUM_5, GPIO_NUM_4, GPIO_NUM_23, GPIO_NUM_15);</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;}</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;<span class="keywordtype">void</span> VGABaseController::end()</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;{</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;  <span class="keywordflow">if</span> (m_DMABuffers) {</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    <span class="keywordflow">if</span> (m_isr_handle) {</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;      esp_intr_free(m_isr_handle);</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;      m_isr_handle = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    }</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;    suspendBackgroundPrimitiveExecution();</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    m_GPIOStream.stop();</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;    freeBuffers();</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;  }</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;}</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;<span class="keywordtype">void</span> VGABaseController::setupGPIO(gpio_num_t gpio, <span class="keywordtype">int</span> bit, gpio_mode_t mode)</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;{</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;  configureGPIO(gpio, mode);</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;  gpio_matrix_out(gpio, I2S1O_DATA_OUT0_IDX + bit, <span class="keyword">false</span>, <span class="keyword">false</span>);</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;}</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;<span class="keywordtype">void</span> VGABaseController::freeBuffers()</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;{</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;  <span class="keywordflow">if</span> (m_DMABuffersCount &gt; 0) {</div><div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;    heap_caps_free((<span class="keywordtype">void</span>*)m_HBlankLine_withVSync);</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    heap_caps_free((<span class="keywordtype">void</span>*)m_HBlankLine);</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;</div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;    freeViewPort();</div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;</div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;    setDMABuffersCount(0);</div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;  }</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;}</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;<span class="keywordtype">void</span> VGABaseController::freeViewPort()</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;{</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;  <span class="keywordflow">for</span> (uint8_t * * poolPtr = m_viewPortMemoryPool; *poolPtr; ++poolPtr) {</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;    heap_caps_free((<span class="keywordtype">void</span>*) *poolPtr);</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;    *poolPtr = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;  }</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;  heap_caps_free(m_viewPort);</div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;  m_viewPort = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;  <span class="keywordflow">if</span> (isDoubleBuffered())</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    heap_caps_free(m_viewPortVisible);</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;  m_viewPortVisible = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;}</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;<span class="comment">// Can be used to change buffers count, maintainig already set pointers.</span></div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;<span class="comment">// If m_doubleBufferOverDMA = true, uses m_DMABuffersHead and m_DMABuffersVisible to implement</span></div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;<span class="comment">// double buffer on DMA level.</span></div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;<span class="keywordtype">bool</span> VGABaseController::setDMABuffersCount(<span class="keywordtype">int</span> buffersCount)</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;{</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;  <span class="keywordflow">if</span> (buffersCount == 0) {</div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;    <span class="keywordflow">if</span> (m_DMABuffersVisible &amp;&amp; m_DMABuffersVisible != m_DMABuffers)</div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;      heap_caps_free( (<span class="keywordtype">void</span>*) m_DMABuffersVisible );</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;    heap_caps_free( (<span class="keywordtype">void</span>*) m_DMABuffers );</div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;    m_DMABuffers = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    m_DMABuffersVisible = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;    m_DMABuffersCount = 0;</div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;  }</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;</div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;  <span class="keywordflow">if</span> (buffersCount != m_DMABuffersCount) {</div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    <span class="comment">// buffers head</span></div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;    <span class="keywordflow">if</span> (m_doubleBufferOverDMA &amp;&amp; m_DMABuffersHead == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;      m_DMABuffersHead = (lldesc_t*) heap_caps_malloc(<span class="keyword">sizeof</span>(lldesc_t), MALLOC_CAP_DMA);</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;      m_DMABuffersHead-&gt;eof    = m_DMABuffersHead-&gt;sosf = m_DMABuffersHead-&gt;offset = 0;</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;      m_DMABuffersHead-&gt;owner  = 1;</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;      m_DMABuffersHead-&gt;size   = 0;</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;      m_DMABuffersHead-&gt;length = 0;</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;      m_DMABuffersHead-&gt;buf    = m_HBlankLine;   <span class="comment">// dummy valid address. Setting nullptr crashes DMA!</span></div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;      m_DMABuffersHead-&gt;qe.stqe_next = <span class="keyword">nullptr</span>;  <span class="comment">// this will be set before the first frame</span></div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    }</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;</div><div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;    <span class="comment">// (re)allocate and initialize DMA descs</span></div><div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;    m_DMABuffers = (lldesc_t*) heap_caps_realloc((<span class="keywordtype">void</span>*)m_DMABuffers, buffersCount * <span class="keyword">sizeof</span>(lldesc_t), MALLOC_CAP_DMA);</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    <span class="keywordflow">if</span> (m_doubleBufferOverDMA &amp;&amp; isDoubleBuffered())</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;      m_DMABuffersVisible = (lldesc_t*) heap_caps_realloc((<span class="keywordtype">void</span>*)m_DMABuffersVisible, buffersCount * <span class="keyword">sizeof</span>(lldesc_t), MALLOC_CAP_DMA);</div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;    <span class="keywordflow">else</span></div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;      m_DMABuffersVisible = m_DMABuffers;</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;    <span class="keywordflow">if</span> (!m_DMABuffers || !m_DMABuffersVisible)</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;      <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;</div><div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;    <span class="keyword">auto</span> buffersHead = m_DMABuffersHead ? m_DMABuffersHead : &amp;m_DMABuffers[0];</div><div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;</div><div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; buffersCount; ++i) {</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;      m_DMABuffers[i].eof          = 0;</div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;      m_DMABuffers[i].sosf         = 0;</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;      m_DMABuffers[i].offset       = 0;</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;      m_DMABuffers[i].owner        = 1;</div><div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;      m_DMABuffers[i].qe.stqe_next = (lldesc_t*) (i == buffersCount - 1 ? buffersHead : &amp;m_DMABuffers[i + 1]);</div><div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;      <span class="keywordflow">if</span> (m_doubleBufferOverDMA &amp;&amp; isDoubleBuffered()) {</div><div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;        m_DMABuffersVisible[i].eof          = 0;</div><div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;        m_DMABuffersVisible[i].sosf         = 0;</div><div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;        m_DMABuffersVisible[i].offset       = 0;</div><div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;        m_DMABuffersVisible[i].owner        = 1;</div><div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;        m_DMABuffersVisible[i].qe.stqe_next = (lldesc_t*) (i == buffersCount - 1 ? buffersHead : &amp;m_DMABuffersVisible[i + 1]);</div><div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;      }</div><div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;    }</div><div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;</div><div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;    m_DMABuffersCount = buffersCount;</div><div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;  }</div><div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;</div><div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;}</div><div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;</div><div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;</div><div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;<span class="comment">// modeline syntax:</span></div><div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;<span class="comment">//   &quot;label&quot; clock_mhz hdisp hsyncstart hsyncend htotal vdisp vsyncstart vsyncend vtotal (+HSync | -HSync) (+VSync | -VSync) [DoubleScan | QuadScan] [FrontPorchBegins | SyncBegins | BackPorchBegins | VisibleBegins] [MultiScanBlank]</span></div><div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;<span class="keywordtype">bool</span> VGABaseController::convertModelineToTimings(<span class="keywordtype">char</span> <span class="keyword">const</span> * modeline, VGATimings * timings)</div><div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;{</div><div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;  <span class="keywordtype">float</span> freq;</div><div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;  <span class="keywordtype">int</span> hdisp, hsyncstart, hsyncend, htotal, vdisp, vsyncstart, vsyncend, vtotal;</div><div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;  <span class="keywordtype">char</span> HSyncPol = 0, VSyncPol = 0;</div><div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;  <span class="keywordtype">int</span> pos = 0;</div><div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;</div><div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;  <span class="keywordtype">int</span> count = sscanf(modeline, <span class="stringliteral">&quot;\&quot;%[^\&quot;]\&quot; %g %d %d %d %d %d %d %d %d %n&quot;</span>, timings-&gt;label, &amp;freq, &amp;hdisp, &amp;hsyncstart, &amp;hsyncend, &amp;htotal, &amp;vdisp, &amp;vsyncstart, &amp;vsyncend, &amp;vtotal, &amp;pos);</div><div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;</div><div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;  <span class="keywordflow">if</span> (count == 10 &amp;&amp; pos &gt; 0) {</div><div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;</div><div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;    timings-&gt;frequency      = freq * 1000000;</div><div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;    timings-&gt;HVisibleArea   = hdisp;</div><div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;    timings-&gt;HFrontPorch    = hsyncstart - hdisp;</div><div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;    timings-&gt;HSyncPulse     = hsyncend - hsyncstart;</div><div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;    timings-&gt;HBackPorch     = htotal - hsyncend;</div><div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;    timings-&gt;VVisibleArea   = vdisp;</div><div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;    timings-&gt;VFrontPorch    = vsyncstart - vdisp;</div><div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;    timings-&gt;VSyncPulse     = vsyncend - vsyncstart;</div><div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;    timings-&gt;VBackPorch     = vtotal - vsyncend;</div><div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;    timings-&gt;HSyncLogic     = <span class="charliteral">&#39;-&#39;</span>;</div><div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;    timings-&gt;VSyncLogic     = <span class="charliteral">&#39;-&#39;</span>;</div><div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;    timings-&gt;scanCount      = 1;</div><div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;    timings-&gt;multiScanBlack = 0;</div><div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;    timings-&gt;HStartingBlock = <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632a3fe66d1dbf572a4f40096a3780f5f5cd">VGAScanStart::FrontPorch</a>;</div><div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;</div><div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;    <span class="comment">// get (+HSync | -HSync) (+VSync | -VSync)</span></div><div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;    <span class="keywordtype">char</span> <span class="keyword">const</span> * pc = modeline + pos;</div><div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;    <span class="keywordflow">for</span> (; *pc; ++pc) {</div><div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;      <span class="keywordflow">if</span> (*pc == <span class="charliteral">&#39;+&#39;</span> || *pc == <span class="charliteral">&#39;-&#39;</span>) {</div><div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;        <span class="keywordflow">if</span> (!HSyncPol)</div><div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;          timings-&gt;HSyncLogic = HSyncPol = *pc;</div><div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;        <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!VSyncPol) {</div><div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;          timings-&gt;VSyncLogic = VSyncPol = *pc;</div><div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;          <span class="keywordflow">while</span> (*pc &amp;&amp; *pc != <span class="charliteral">&#39; &#39;</span>)</div><div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;            ++pc;</div><div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;          <span class="keywordflow">break</span>;</div><div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;        }</div><div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;      }</div><div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;    }</div><div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;</div><div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;    <span class="comment">// get [DoubleScan | QuadScan] [FrontPorchBegins | SyncBegins | BackPorchBegins | VisibleBegins] [MultiScanBlank]</span></div><div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;    <span class="comment">// actually this gets only the first character</span></div><div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;    <span class="keywordflow">while</span> (*pc) {</div><div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;      <span class="keywordflow">switch</span> (*pc) {</div><div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;D&#39;</span>:</div><div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;d&#39;</span>:</div><div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;          timings-&gt;scanCount = 2;</div><div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;          <span class="keywordflow">break</span>;</div><div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;Q&#39;</span>:</div><div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;q&#39;</span>:</div><div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;          timings-&gt;scanCount = 4;</div><div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;          <span class="keywordflow">break</span>;</div><div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;F&#39;</span>:</div><div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;f&#39;</span>:</div><div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;          timings-&gt;HStartingBlock = <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632a3fe66d1dbf572a4f40096a3780f5f5cd">VGAScanStart::FrontPorch</a>;</div><div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;          <span class="keywordflow">break</span>;</div><div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;S&#39;</span>:</div><div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;s&#39;</span>:</div><div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;          timings-&gt;HStartingBlock = <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632aa1c3e25967ce8edc4bf943ae05fa7af9">VGAScanStart::Sync</a>;</div><div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;          <span class="keywordflow">break</span>;</div><div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;B&#39;</span>:</div><div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;b&#39;</span>:</div><div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;          timings-&gt;HStartingBlock = <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632ad5f83b0219ea6b63db4fedab582a2da5">VGAScanStart::BackPorch</a>;</div><div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;          <span class="keywordflow">break</span>;</div><div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;V&#39;</span>:</div><div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;v&#39;</span>:</div><div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;          timings-&gt;HStartingBlock = <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632ad37a59f433488f345c4201a061f088e6">VGAScanStart::VisibleArea</a>;</div><div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;          <span class="keywordflow">break</span>;</div><div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;M&#39;</span>:</div><div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39;m&#39;</span>:</div><div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;          timings-&gt;multiScanBlack = 1;</div><div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;          <span class="keywordflow">break</span>;</div><div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;        <span class="keywordflow">case</span> <span class="charliteral">&#39; &#39;</span>:</div><div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;          ++pc;</div><div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;          <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;      }</div><div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;      ++pc;</div><div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;      <span class="keywordflow">while</span> (*pc &amp;&amp; *pc != <span class="charliteral">&#39; &#39;</span>)</div><div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;        ++pc;</div><div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;    }</div><div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;</div><div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;</div><div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;  }</div><div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;}</div><div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;</div><div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;</div><div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;<span class="comment">// Suspend vertical sync interrupt</span></div><div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;<span class="comment">// Warning: After call to suspendBackgroundPrimitiveExecution() adding primitives may cause a deadlock.</span></div><div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;<span class="comment">// To avoid this a call to &quot;processPrimitives()&quot; should be performed very often.</span></div><div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;<span class="comment">// Can be nested</span></div><div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;<span class="keywordtype">void</span> VGABaseController::suspendBackgroundPrimitiveExecution()</div><div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;{</div><div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;  ++m_primitiveProcessingSuspended;</div><div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;}</div><div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;</div><div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;</div><div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;<span class="comment">// Resume vertical sync interrupt after suspendBackgroundPrimitiveExecution()</span></div><div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;<span class="comment">// Can be nested</span></div><div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;<span class="keywordtype">void</span> VGABaseController::resumeBackgroundPrimitiveExecution()</div><div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;{</div><div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;  m_primitiveProcessingSuspended = tmax(0, m_primitiveProcessingSuspended - 1);</div><div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;}</div><div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;</div><div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;</div><div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;<span class="keywordtype">void</span> VGABaseController::startGPIOStream()</div><div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;{</div><div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;  m_GPIOStream.play(m_timings.frequency, m_DMABuffers);</div><div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;}</div><div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;</div><div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;</div><div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;<span class="keywordtype">void</span> VGABaseController::setResolution(<span class="keywordtype">char</span> <span class="keyword">const</span> * modeline, <span class="keywordtype">int</span> viewPortWidth, <span class="keywordtype">int</span> viewPortHeight, <span class="keywordtype">bool</span> doubleBuffered)</div><div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;{</div><div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;  VGATimings timings;</div><div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;  <span class="keywordflow">if</span> (convertModelineToTimings(modeline, &amp;timings))</div><div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;    setResolution(timings, viewPortWidth, viewPortHeight, doubleBuffered);</div><div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;}</div><div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;</div><div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;</div><div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;<span class="keywordtype">void</span> VGABaseController::setResolution(VGATimings <span class="keyword">const</span>&amp; timings, <span class="keywordtype">int</span> viewPortWidth, <span class="keywordtype">int</span> viewPortHeight, <span class="keywordtype">bool</span> doubleBuffered)</div><div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;{</div><div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;  <span class="comment">// just in case setResolution() was called before</span></div><div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;  end();</div><div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;</div><div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;  m_timings = timings;</div><div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;</div><div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;  <span class="comment">// inform base class about screen size</span></div><div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;  setScreenSize(m_timings.HVisibleArea, m_timings.VVisibleArea);</div><div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;</div><div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;  setDoubleBuffered(doubleBuffered);</div><div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;</div><div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;  m_HVSync = packHVSync(<span class="keyword">false</span>, <span class="keyword">false</span>);</div><div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;</div><div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;  m_HLineSize = m_timings.HFrontPorch + m_timings.HSyncPulse + m_timings.HBackPorch + m_timings.HVisibleArea;</div><div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;</div><div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;  m_HBlankLine_withVSync = (uint8_t*) heap_caps_malloc(m_HLineSize, MALLOC_CAP_DMA);</div><div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;  m_HBlankLine           = (uint8_t*) heap_caps_malloc(m_HLineSize, MALLOC_CAP_DMA);</div><div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;</div><div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;  m_viewPortWidth  = ~3 &amp; (viewPortWidth &lt;= 0 || viewPortWidth &gt;= m_timings.HVisibleArea ? m_timings.HVisibleArea : viewPortWidth); <span class="comment">// view port width must be 32 bit aligned</span></div><div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;  m_viewPortHeight = viewPortHeight &lt;= 0 || viewPortHeight &gt;= m_timings.VVisibleArea ? m_timings.VVisibleArea : viewPortHeight;</div><div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;</div><div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;  <span class="comment">// adjust view port size if necessary</span></div><div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;  checkViewPortSize();</div><div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;</div><div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;  <span class="comment">// need to center viewport?</span></div><div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;  m_viewPortCol = (m_timings.HVisibleArea - m_viewPortWidth) / 2;</div><div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;  m_viewPortRow = (m_timings.VVisibleArea - m_viewPortHeight) / 2;</div><div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;</div><div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;  <span class="comment">// view port col and row must be 32 bit aligned</span></div><div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;  m_viewPortCol = m_viewPortCol &amp; ~3;</div><div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;  m_viewPortRow = m_viewPortRow &amp; ~3;</div><div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;</div><div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;  m_rawFrameHeight = m_timings.VVisibleArea + m_timings.VFrontPorch + m_timings.VSyncPulse + m_timings.VBackPorch;</div><div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;</div><div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;  <span class="comment">// allocate DMA descriptors</span></div><div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;  setDMABuffersCount(calcRequiredDMABuffersCount(m_viewPortHeight));</div><div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;</div><div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;  <span class="comment">// allocate the viewport</span></div><div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;  allocateViewPort();</div><div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;</div><div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;  <span class="comment">// adjust again view port size if necessary</span></div><div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;  checkViewPortSize();</div><div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;</div><div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;  <span class="comment">// this may free space if m_viewPortHeight has been reduced</span></div><div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;  setDMABuffersCount(calcRequiredDMABuffersCount(m_viewPortHeight));</div><div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;</div><div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;  <span class="comment">// fill buffers</span></div><div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;  fillVertBuffers(0);</div><div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;  fillHorizBuffers(0);</div><div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;</div><div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;  resetPaintState();</div><div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;</div><div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;  <span class="keywordflow">if</span> (m_doubleBufferOverDMA)</div><div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;    m_DMABuffersHead-&gt;qe.stqe_next = (lldesc_t*) &amp;m_DMABuffersVisible[0];</div><div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;}</div><div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;</div><div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;</div><div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;<span class="comment">// this method may adjust m_viewPortHeight to the actual number of allocated rows.</span></div><div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;<span class="comment">// to reduce memory allocation overhead try to allocate the minimum number of blocks.</span></div><div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160;<span class="keywordtype">void</span> VGABaseController::allocateViewPort(uint32_t allocCaps, <span class="keywordtype">int</span> rowlen)</div><div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;{</div><div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;  <span class="keywordtype">int</span> linesCount[FABGLIB_VIEWPORT_MEMORY_POOL_COUNT]; <span class="comment">// where store number of lines for each pool</span></div><div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;  <span class="keywordtype">int</span> poolsCount = 0; <span class="comment">// number of allocated pools</span></div><div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;  <span class="keywordtype">int</span> remainingLines = m_viewPortHeight;</div><div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;  m_viewPortHeight = 0; <span class="comment">// m_viewPortHeight needs to be recalculated</span></div><div class="line"><a name="l00405"></a><span class="lineno">  405</span>&#160;</div><div class="line"><a name="l00406"></a><span class="lineno">  406</span>&#160;  <span class="keywordflow">if</span> (isDoubleBuffered())</div><div class="line"><a name="l00407"></a><span class="lineno">  407</span>&#160;    remainingLines *= 2;</div><div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;</div><div class="line"><a name="l00409"></a><span class="lineno">  409</span>&#160;  <span class="comment">// allocate pools</span></div><div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;  <span class="keywordflow">while</span> (remainingLines &gt; 0 &amp;&amp; poolsCount &lt; FABGLIB_VIEWPORT_MEMORY_POOL_COUNT) {</div><div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;    <span class="keywordtype">int</span> largestBlock = heap_caps_get_largest_free_block(allocCaps);</div><div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;    linesCount[poolsCount] = tmin(remainingLines, largestBlock / rowlen);</div><div class="line"><a name="l00413"></a><span class="lineno">  413</span>&#160;    <span class="keywordflow">if</span> (linesCount[poolsCount] == 0)  <span class="comment">// no more memory available for lines</span></div><div class="line"><a name="l00414"></a><span class="lineno">  414</span>&#160;      <span class="keywordflow">break</span>;</div><div class="line"><a name="l00415"></a><span class="lineno">  415</span>&#160;    m_viewPortMemoryPool[poolsCount] = (uint8_t*) heap_caps_malloc(linesCount[poolsCount] * rowlen, allocCaps);</div><div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;    remainingLines -= linesCount[poolsCount];</div><div class="line"><a name="l00417"></a><span class="lineno">  417</span>&#160;    m_viewPortHeight += linesCount[poolsCount];</div><div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;    ++poolsCount;</div><div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;  }</div><div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;  m_viewPortMemoryPool[poolsCount] = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;</div><div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;  <span class="comment">// fill m_viewPort[] with line pointers</span></div><div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;  <span class="keywordflow">if</span> (isDoubleBuffered()) {</div><div class="line"><a name="l00424"></a><span class="lineno">  424</span>&#160;    m_viewPortHeight /= 2;</div><div class="line"><a name="l00425"></a><span class="lineno">  425</span>&#160;    m_viewPortVisible = (<span class="keyword">volatile</span> uint8_t * *) heap_caps_malloc(<span class="keyword">sizeof</span>(uint8_t*) * m_viewPortHeight, MALLOC_CAP_32BIT | MALLOC_CAP_INTERNAL);</div><div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;  }</div><div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;  m_viewPort = (<span class="keyword">volatile</span> uint8_t * *) heap_caps_malloc(<span class="keyword">sizeof</span>(uint8_t*) * m_viewPortHeight, MALLOC_CAP_32BIT | MALLOC_CAP_INTERNAL);</div><div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;  <span class="keywordflow">if</span> (!isDoubleBuffered())</div><div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;    m_viewPortVisible = m_viewPort;</div><div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> p = 0, l = 0; p &lt; poolsCount; ++p) {</div><div class="line"><a name="l00431"></a><span class="lineno">  431</span>&#160;    uint8_t * pool = m_viewPortMemoryPool[p];</div><div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; linesCount[p]; ++i) {</div><div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;      <span class="keywordflow">if</span> (l + i &lt; m_viewPortHeight)</div><div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;        m_viewPort[l + i] = pool;</div><div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;      <span class="keywordflow">else</span></div><div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;        m_viewPortVisible[l + i - m_viewPortHeight] = pool; <span class="comment">// set only when double buffered is enabled</span></div><div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160;      pool += rowlen;</div><div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160;    }</div><div class="line"><a name="l00439"></a><span class="lineno">  439</span>&#160;    l += linesCount[p];</div><div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;  }</div><div class="line"><a name="l00441"></a><span class="lineno">  441</span>&#160;}</div><div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;</div><div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;</div><div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;uint8_t IRAM_ATTR VGABaseController::packHVSync(<span class="keywordtype">bool</span> HSync, <span class="keywordtype">bool</span> VSync)</div><div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;{</div><div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;  uint8_t hsync_value = (m_timings.HSyncLogic == <span class="charliteral">&#39;+&#39;</span> ? (HSync ? 1 : 0) : (HSync ? 0 : 1));</div><div class="line"><a name="l00447"></a><span class="lineno">  447</span>&#160;  uint8_t vsync_value = (m_timings.VSyncLogic == <span class="charliteral">&#39;+&#39;</span> ? (VSync ? 1 : 0) : (VSync ? 0 : 1));</div><div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;  <span class="keywordflow">return</span> (vsync_value &lt;&lt; VGA_VSYNC_BIT) | (hsync_value &lt;&lt; VGA_HSYNC_BIT);</div><div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;}</div><div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;</div><div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160;</div><div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;uint8_t IRAM_ATTR VGABaseController::preparePixelWithSync(RGB222 rgb, <span class="keywordtype">bool</span> HSync, <span class="keywordtype">bool</span> VSync)</div><div class="line"><a name="l00453"></a><span class="lineno">  453</span>&#160;{</div><div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;  <span class="keywordflow">return</span> packHVSync(HSync, VSync) | (rgb.B &lt;&lt; VGA_BLUE_BIT) | (rgb.G &lt;&lt; VGA_GREEN_BIT) | (rgb.R &lt;&lt; VGA_RED_BIT);</div><div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;}</div><div class="line"><a name="l00456"></a><span class="lineno">  456</span>&#160;</div><div class="line"><a name="l00457"></a><span class="lineno">  457</span>&#160;</div><div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;<span class="keywordtype">int</span> VGABaseController::calcRequiredDMABuffersCount(<span class="keywordtype">int</span> viewPortHeight)</div><div class="line"><a name="l00459"></a><span class="lineno">  459</span>&#160;{</div><div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;  <span class="keywordtype">int</span> rightPadSize = m_timings.HVisibleArea - m_viewPortWidth - m_viewPortCol;</div><div class="line"><a name="l00461"></a><span class="lineno">  461</span>&#160;  <span class="keywordtype">int</span> buffersCount = m_timings.scanCount * (m_rawFrameHeight + viewPortHeight);</div><div class="line"><a name="l00462"></a><span class="lineno">  462</span>&#160;</div><div class="line"><a name="l00463"></a><span class="lineno">  463</span>&#160;  <span class="keywordflow">switch</span> (m_timings.HStartingBlock) {</div><div class="line"><a name="l00464"></a><span class="lineno">  464</span>&#160;    <span class="keywordflow">case</span> <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632a3fe66d1dbf572a4f40096a3780f5f5cd">VGAScanStart::FrontPorch</a>:</div><div class="line"><a name="l00465"></a><span class="lineno">  465</span>&#160;      <span class="comment">// FRONTPORCH -&gt; SYNC -&gt; BACKPORCH -&gt; VISIBLEAREA</span></div><div class="line"><a name="l00466"></a><span class="lineno">  466</span>&#160;      buffersCount += m_timings.scanCount * (rightPadSize &gt; 0 ? viewPortHeight : 0);</div><div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;      <span class="keywordflow">break</span>;</div><div class="line"><a name="l00468"></a><span class="lineno">  468</span>&#160;    <span class="keywordflow">case</span> <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632aa1c3e25967ce8edc4bf943ae05fa7af9">VGAScanStart::Sync</a>:</div><div class="line"><a name="l00469"></a><span class="lineno">  469</span>&#160;      <span class="comment">// SYNC -&gt; BACKPORCH -&gt; VISIBLEAREA -&gt; FRONTPORCH</span></div><div class="line"><a name="l00470"></a><span class="lineno">  470</span>&#160;      buffersCount += m_timings.scanCount * viewPortHeight;</div><div class="line"><a name="l00471"></a><span class="lineno">  471</span>&#160;      <span class="keywordflow">break</span>;</div><div class="line"><a name="l00472"></a><span class="lineno">  472</span>&#160;    <span class="keywordflow">case</span> <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632ad5f83b0219ea6b63db4fedab582a2da5">VGAScanStart::BackPorch</a>:</div><div class="line"><a name="l00473"></a><span class="lineno">  473</span>&#160;      <span class="comment">// BACKPORCH -&gt; VISIBLEAREA -&gt; FRONTPORCH -&gt; SYNC</span></div><div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;      buffersCount += m_timings.scanCount * viewPortHeight;</div><div class="line"><a name="l00475"></a><span class="lineno">  475</span>&#160;      <span class="keywordflow">break</span>;</div><div class="line"><a name="l00476"></a><span class="lineno">  476</span>&#160;    <span class="keywordflow">case</span> <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632ad37a59f433488f345c4201a061f088e6">VGAScanStart::VisibleArea</a>:</div><div class="line"><a name="l00477"></a><span class="lineno">  477</span>&#160;      <span class="comment">// VISIBLEAREA -&gt; FRONTPORCH -&gt; SYNC -&gt; BACKPORCH</span></div><div class="line"><a name="l00478"></a><span class="lineno">  478</span>&#160;      buffersCount += m_timings.scanCount * (m_viewPortCol &gt; 0 ? viewPortHeight : 0);</div><div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;      <span class="keywordflow">break</span>;</div><div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;  }</div><div class="line"><a name="l00481"></a><span class="lineno">  481</span>&#160;</div><div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;  <span class="keywordflow">return</span> buffersCount;</div><div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;}</div><div class="line"><a name="l00484"></a><span class="lineno">  484</span>&#160;</div><div class="line"><a name="l00485"></a><span class="lineno">  485</span>&#160;</div><div class="line"><a name="l00486"></a><span class="lineno">  486</span>&#160;<span class="comment">// refill buffers changing Front Porch and Back Porch</span></div><div class="line"><a name="l00487"></a><span class="lineno">  487</span>&#160;<span class="comment">// offsetX : (&lt; 0 : left  &gt; 0 right)</span></div><div class="line"><a name="l00488"></a><span class="lineno">  488</span>&#160;<span class="keywordtype">void</span> VGABaseController::fillHorizBuffers(<span class="keywordtype">int</span> offsetX)</div><div class="line"><a name="l00489"></a><span class="lineno">  489</span>&#160;{</div><div class="line"><a name="l00490"></a><span class="lineno">  490</span>&#160;  <span class="comment">// fill all with no hsync</span></div><div class="line"><a name="l00491"></a><span class="lineno">  491</span>&#160;</div><div class="line"><a name="l00492"></a><span class="lineno">  492</span>&#160;  fill(m_HBlankLine,           0, m_HLineSize, 0, 0, 0, <span class="keyword">false</span>, <span class="keyword">false</span>);</div><div class="line"><a name="l00493"></a><span class="lineno">  493</span>&#160;  fill(m_HBlankLine_withVSync, 0, m_HLineSize, 0, 0, 0, <span class="keyword">false</span>,  <span class="keyword">true</span>);</div><div class="line"><a name="l00494"></a><span class="lineno">  494</span>&#160;</div><div class="line"><a name="l00495"></a><span class="lineno">  495</span>&#160;  <span class="comment">// calculate hsync pos and fill it</span></div><div class="line"><a name="l00496"></a><span class="lineno">  496</span>&#160;</div><div class="line"><a name="l00497"></a><span class="lineno">  497</span>&#160;  int16_t porchSum = m_timings.HFrontPorch + m_timings.HBackPorch;</div><div class="line"><a name="l00498"></a><span class="lineno">  498</span>&#160;  m_timings.HFrontPorch = tmax(8, (int16_t)m_timings.HFrontPorch - offsetX);</div><div class="line"><a name="l00499"></a><span class="lineno">  499</span>&#160;  m_timings.HBackPorch  = tmax(8, porchSum - m_timings.HFrontPorch);</div><div class="line"><a name="l00500"></a><span class="lineno">  500</span>&#160;  m_timings.HFrontPorch = porchSum - m_timings.HBackPorch;</div><div class="line"><a name="l00501"></a><span class="lineno">  501</span>&#160;</div><div class="line"><a name="l00502"></a><span class="lineno">  502</span>&#160;  <span class="keywordtype">int</span> syncPos = 0;</div><div class="line"><a name="l00503"></a><span class="lineno">  503</span>&#160;</div><div class="line"><a name="l00504"></a><span class="lineno">  504</span>&#160;  <span class="keywordflow">switch</span> (m_timings.HStartingBlock) {</div><div class="line"><a name="l00505"></a><span class="lineno">  505</span>&#160;    <span class="keywordflow">case</span> <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632a3fe66d1dbf572a4f40096a3780f5f5cd">VGAScanStart::FrontPorch</a>:</div><div class="line"><a name="l00506"></a><span class="lineno">  506</span>&#160;      <span class="comment">// FRONTPORCH -&gt; SYNC -&gt; BACKPORCH -&gt; VISIBLEAREA</span></div><div class="line"><a name="l00507"></a><span class="lineno">  507</span>&#160;      syncPos = m_timings.HFrontPorch;</div><div class="line"><a name="l00508"></a><span class="lineno">  508</span>&#160;      <span class="keywordflow">break</span>;</div><div class="line"><a name="l00509"></a><span class="lineno">  509</span>&#160;    <span class="keywordflow">case</span> <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632aa1c3e25967ce8edc4bf943ae05fa7af9">VGAScanStart::Sync</a>:</div><div class="line"><a name="l00510"></a><span class="lineno">  510</span>&#160;      <span class="comment">// SYNC -&gt; BACKPORCH -&gt; VISIBLEAREA -&gt; FRONTPORCH</span></div><div class="line"><a name="l00511"></a><span class="lineno">  511</span>&#160;      syncPos = 0;</div><div class="line"><a name="l00512"></a><span class="lineno">  512</span>&#160;      <span class="keywordflow">break</span>;</div><div class="line"><a name="l00513"></a><span class="lineno">  513</span>&#160;    <span class="keywordflow">case</span> <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632ad5f83b0219ea6b63db4fedab582a2da5">VGAScanStart::BackPorch</a>:</div><div class="line"><a name="l00514"></a><span class="lineno">  514</span>&#160;      <span class="comment">// BACKPORCH -&gt; VISIBLEAREA -&gt; FRONTPORCH -&gt; SYNC</span></div><div class="line"><a name="l00515"></a><span class="lineno">  515</span>&#160;      syncPos = m_timings.HBackPorch + m_timings.HVisibleArea + m_timings.HFrontPorch;</div><div class="line"><a name="l00516"></a><span class="lineno">  516</span>&#160;      <span class="keywordflow">break</span>;</div><div class="line"><a name="l00517"></a><span class="lineno">  517</span>&#160;    <span class="keywordflow">case</span> <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632ad37a59f433488f345c4201a061f088e6">VGAScanStart::VisibleArea</a>:</div><div class="line"><a name="l00518"></a><span class="lineno">  518</span>&#160;      <span class="comment">// VISIBLEAREA -&gt; FRONTPORCH -&gt; SYNC -&gt; BACKPORCH</span></div><div class="line"><a name="l00519"></a><span class="lineno">  519</span>&#160;      syncPos = m_timings.HVisibleArea + m_timings.HFrontPorch;</div><div class="line"><a name="l00520"></a><span class="lineno">  520</span>&#160;      <span class="keywordflow">break</span>;</div><div class="line"><a name="l00521"></a><span class="lineno">  521</span>&#160;  }</div><div class="line"><a name="l00522"></a><span class="lineno">  522</span>&#160;</div><div class="line"><a name="l00523"></a><span class="lineno">  523</span>&#160;  fill(m_HBlankLine,           syncPos, m_timings.HSyncPulse, 0, 0, 0, <span class="keyword">true</span>,  <span class="keyword">false</span>);</div><div class="line"><a name="l00524"></a><span class="lineno">  524</span>&#160;  fill(m_HBlankLine_withVSync, syncPos, m_timings.HSyncPulse, 0, 0, 0, <span class="keyword">true</span>,   <span class="keyword">true</span>);</div><div class="line"><a name="l00525"></a><span class="lineno">  525</span>&#160;}</div><div class="line"><a name="l00526"></a><span class="lineno">  526</span>&#160;</div><div class="line"><a name="l00527"></a><span class="lineno">  527</span>&#160;</div><div class="line"><a name="l00528"></a><span class="lineno">  528</span>&#160;<span class="keywordtype">void</span> VGABaseController::fillVertBuffers(<span class="keywordtype">int</span> offsetY)</div><div class="line"><a name="l00529"></a><span class="lineno">  529</span>&#160;{</div><div class="line"><a name="l00530"></a><span class="lineno">  530</span>&#160;  int16_t porchSum = m_timings.VFrontPorch + m_timings.VBackPorch;</div><div class="line"><a name="l00531"></a><span class="lineno">  531</span>&#160;  m_timings.VFrontPorch = tmax(1, (int16_t)m_timings.VFrontPorch - offsetY);</div><div class="line"><a name="l00532"></a><span class="lineno">  532</span>&#160;  m_timings.VBackPorch  = tmax(1, porchSum - m_timings.VFrontPorch);</div><div class="line"><a name="l00533"></a><span class="lineno">  533</span>&#160;  m_timings.VFrontPorch = porchSum - m_timings.VBackPorch;</div><div class="line"><a name="l00534"></a><span class="lineno">  534</span>&#160;</div><div class="line"><a name="l00535"></a><span class="lineno">  535</span>&#160;  <span class="comment">// associate buffers pointer to DMA info buffers</span></div><div class="line"><a name="l00536"></a><span class="lineno">  536</span>&#160;  <span class="comment">//</span></div><div class="line"><a name="l00537"></a><span class="lineno">  537</span>&#160;  <span class="comment">//  Vertical order:</span></div><div class="line"><a name="l00538"></a><span class="lineno">  538</span>&#160;  <span class="comment">//    VisibleArea</span></div><div class="line"><a name="l00539"></a><span class="lineno">  539</span>&#160;  <span class="comment">//    Front Porch</span></div><div class="line"><a name="l00540"></a><span class="lineno">  540</span>&#160;  <span class="comment">//    Sync</span></div><div class="line"><a name="l00541"></a><span class="lineno">  541</span>&#160;  <span class="comment">//    Back Porch</span></div><div class="line"><a name="l00542"></a><span class="lineno">  542</span>&#160;</div><div class="line"><a name="l00543"></a><span class="lineno">  543</span>&#160;  <span class="keywordtype">int</span> VVisibleArea_pos = 0;</div><div class="line"><a name="l00544"></a><span class="lineno">  544</span>&#160;  <span class="keywordtype">int</span> VFrontPorch_pos  = VVisibleArea_pos + m_timings.VVisibleArea;</div><div class="line"><a name="l00545"></a><span class="lineno">  545</span>&#160;  <span class="keywordtype">int</span> VSync_pos        = VFrontPorch_pos  + m_timings.VFrontPorch;</div><div class="line"><a name="l00546"></a><span class="lineno">  546</span>&#160;  <span class="keywordtype">int</span> VBackPorch_pos   = VSync_pos        + m_timings.VSyncPulse;</div><div class="line"><a name="l00547"></a><span class="lineno">  547</span>&#160;</div><div class="line"><a name="l00548"></a><span class="lineno">  548</span>&#160;  <span class="keywordtype">int</span> rightPadSize = m_timings.HVisibleArea - m_viewPortWidth - m_viewPortCol;</div><div class="line"><a name="l00549"></a><span class="lineno">  549</span>&#160;</div><div class="line"><a name="l00550"></a><span class="lineno">  550</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> line = 0, DMABufIdx = 0; line &lt; m_rawFrameHeight; ++line) {</div><div class="line"><a name="l00551"></a><span class="lineno">  551</span>&#160;</div><div class="line"><a name="l00552"></a><span class="lineno">  552</span>&#160;    <span class="keywordtype">bool</span> isVVisibleArea = (line &lt; VFrontPorch_pos);</div><div class="line"><a name="l00553"></a><span class="lineno">  553</span>&#160;    <span class="keywordtype">bool</span> isVFrontPorch  = (line &gt;= VFrontPorch_pos &amp;&amp; line &lt; VSync_pos);</div><div class="line"><a name="l00554"></a><span class="lineno">  554</span>&#160;    <span class="keywordtype">bool</span> isVSync        = (line &gt;= VSync_pos &amp;&amp; line &lt; VBackPorch_pos);</div><div class="line"><a name="l00555"></a><span class="lineno">  555</span>&#160;    <span class="keywordtype">bool</span> isVBackPorch   = (line &gt;= VBackPorch_pos);</div><div class="line"><a name="l00556"></a><span class="lineno">  556</span>&#160;</div><div class="line"><a name="l00557"></a><span class="lineno">  557</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> scan = 0; scan &lt; m_timings.scanCount; ++scan) {</div><div class="line"><a name="l00558"></a><span class="lineno">  558</span>&#160;</div><div class="line"><a name="l00559"></a><span class="lineno">  559</span>&#160;      <span class="keywordtype">bool</span> isStartOfVertFrontPorch = (line == VFrontPorch_pos &amp;&amp; scan == 0);</div><div class="line"><a name="l00560"></a><span class="lineno">  560</span>&#160;</div><div class="line"><a name="l00561"></a><span class="lineno">  561</span>&#160;      <span class="keywordflow">if</span> (isVSync) {</div><div class="line"><a name="l00562"></a><span class="lineno">  562</span>&#160;</div><div class="line"><a name="l00563"></a><span class="lineno">  563</span>&#160;        setDMABufferBlank(DMABufIdx++, m_HBlankLine_withVSync, m_HLineSize, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00564"></a><span class="lineno">  564</span>&#160;</div><div class="line"><a name="l00565"></a><span class="lineno">  565</span>&#160;      } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (isVFrontPorch || isVBackPorch) {</div><div class="line"><a name="l00566"></a><span class="lineno">  566</span>&#160;</div><div class="line"><a name="l00567"></a><span class="lineno">  567</span>&#160;        setDMABufferBlank(DMABufIdx++, m_HBlankLine, m_HLineSize, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00568"></a><span class="lineno">  568</span>&#160;</div><div class="line"><a name="l00569"></a><span class="lineno">  569</span>&#160;      } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (isVVisibleArea) {</div><div class="line"><a name="l00570"></a><span class="lineno">  570</span>&#160;</div><div class="line"><a name="l00571"></a><span class="lineno">  571</span>&#160;        <span class="keywordtype">int</span> visibleAreaLine = line - VVisibleArea_pos;</div><div class="line"><a name="l00572"></a><span class="lineno">  572</span>&#160;        <span class="keywordtype">bool</span> isViewport = visibleAreaLine &gt;= m_viewPortRow &amp;&amp; visibleAreaLine &lt; m_viewPortRow + m_viewPortHeight;</div><div class="line"><a name="l00573"></a><span class="lineno">  573</span>&#160;        <span class="keywordtype">int</span> HInvisibleAreaSize = m_HLineSize - m_timings.HVisibleArea;</div><div class="line"><a name="l00574"></a><span class="lineno">  574</span>&#160;</div><div class="line"><a name="l00575"></a><span class="lineno">  575</span>&#160;        <span class="keywordflow">if</span> (isViewport) {</div><div class="line"><a name="l00576"></a><span class="lineno">  576</span>&#160;          <span class="comment">// visible, this is the viewport</span></div><div class="line"><a name="l00577"></a><span class="lineno">  577</span>&#160;          <span class="keywordflow">switch</span> (m_timings.HStartingBlock) {</div><div class="line"><a name="l00578"></a><span class="lineno">  578</span>&#160;            <span class="keywordflow">case</span> <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632a3fe66d1dbf572a4f40096a3780f5f5cd">VGAScanStart::FrontPorch</a>:</div><div class="line"><a name="l00579"></a><span class="lineno">  579</span>&#160;              <span class="comment">// FRONTPORCH -&gt; SYNC -&gt; BACKPORCH -&gt; VISIBLEAREA</span></div><div class="line"><a name="l00580"></a><span class="lineno">  580</span>&#160;              setDMABufferBlank(DMABufIdx++, m_HBlankLine, HInvisibleAreaSize + m_viewPortCol, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00581"></a><span class="lineno">  581</span>&#160;              setDMABufferView(DMABufIdx++, visibleAreaLine - m_viewPortRow, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00582"></a><span class="lineno">  582</span>&#160;              <span class="keywordflow">if</span> (rightPadSize &gt; 0)</div><div class="line"><a name="l00583"></a><span class="lineno">  583</span>&#160;                setDMABufferBlank(DMABufIdx++, m_HBlankLine + HInvisibleAreaSize, rightPadSize, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00584"></a><span class="lineno">  584</span>&#160;              <span class="keywordflow">break</span>;</div><div class="line"><a name="l00585"></a><span class="lineno">  585</span>&#160;            <span class="keywordflow">case</span> <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632aa1c3e25967ce8edc4bf943ae05fa7af9">VGAScanStart::Sync</a>:</div><div class="line"><a name="l00586"></a><span class="lineno">  586</span>&#160;              <span class="comment">// SYNC -&gt; BACKPORCH -&gt; VISIBLEAREA -&gt; FRONTPORCH</span></div><div class="line"><a name="l00587"></a><span class="lineno">  587</span>&#160;              setDMABufferBlank(DMABufIdx++, m_HBlankLine, m_timings.HSyncPulse + m_timings.HBackPorch + m_viewPortCol, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00588"></a><span class="lineno">  588</span>&#160;              setDMABufferView(DMABufIdx++, visibleAreaLine - m_viewPortRow, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00589"></a><span class="lineno">  589</span>&#160;              setDMABufferBlank(DMABufIdx++, m_HBlankLine + m_HLineSize - m_timings.HFrontPorch - rightPadSize, m_timings.HFrontPorch + rightPadSize, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00590"></a><span class="lineno">  590</span>&#160;              <span class="keywordflow">break</span>;</div><div class="line"><a name="l00591"></a><span class="lineno">  591</span>&#160;            <span class="keywordflow">case</span> <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632ad5f83b0219ea6b63db4fedab582a2da5">VGAScanStart::BackPorch</a>:</div><div class="line"><a name="l00592"></a><span class="lineno">  592</span>&#160;              <span class="comment">// BACKPORCH -&gt; VISIBLEAREA -&gt; FRONTPORCH -&gt; SYNC</span></div><div class="line"><a name="l00593"></a><span class="lineno">  593</span>&#160;              setDMABufferBlank(DMABufIdx++, m_HBlankLine, m_timings.HBackPorch + m_viewPortCol, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00594"></a><span class="lineno">  594</span>&#160;              setDMABufferView(DMABufIdx++, visibleAreaLine - m_viewPortRow, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00595"></a><span class="lineno">  595</span>&#160;              setDMABufferBlank(DMABufIdx++, m_HBlankLine + m_HLineSize - m_timings.HFrontPorch - m_timings.HSyncPulse - rightPadSize, m_timings.HFrontPorch + m_timings.HSyncPulse + rightPadSize, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00596"></a><span class="lineno">  596</span>&#160;              <span class="keywordflow">break</span>;</div><div class="line"><a name="l00597"></a><span class="lineno">  597</span>&#160;            <span class="keywordflow">case</span> <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632ad37a59f433488f345c4201a061f088e6">VGAScanStart::VisibleArea</a>:</div><div class="line"><a name="l00598"></a><span class="lineno">  598</span>&#160;              <span class="comment">// VISIBLEAREA -&gt; FRONTPORCH -&gt; SYNC -&gt; BACKPORCH</span></div><div class="line"><a name="l00599"></a><span class="lineno">  599</span>&#160;              <span class="keywordflow">if</span> (m_viewPortCol &gt; 0)</div><div class="line"><a name="l00600"></a><span class="lineno">  600</span>&#160;                setDMABufferBlank(DMABufIdx++, m_HBlankLine, m_viewPortCol, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00601"></a><span class="lineno">  601</span>&#160;              setDMABufferView(DMABufIdx++, visibleAreaLine - m_viewPortRow, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00602"></a><span class="lineno">  602</span>&#160;              setDMABufferBlank(DMABufIdx++, m_HBlankLine + m_timings.HVisibleArea - rightPadSize, HInvisibleAreaSize + rightPadSize, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00603"></a><span class="lineno">  603</span>&#160;              <span class="keywordflow">break</span>;</div><div class="line"><a name="l00604"></a><span class="lineno">  604</span>&#160;          }</div><div class="line"><a name="l00605"></a><span class="lineno">  605</span>&#160;</div><div class="line"><a name="l00606"></a><span class="lineno">  606</span>&#160;        } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00607"></a><span class="lineno">  607</span>&#160;          <span class="comment">// not visible</span></div><div class="line"><a name="l00608"></a><span class="lineno">  608</span>&#160;          setDMABufferBlank(DMABufIdx++, m_HBlankLine, m_HLineSize, scan, isStartOfVertFrontPorch);</div><div class="line"><a name="l00609"></a><span class="lineno">  609</span>&#160;        }</div><div class="line"><a name="l00610"></a><span class="lineno">  610</span>&#160;</div><div class="line"><a name="l00611"></a><span class="lineno">  611</span>&#160;      }</div><div class="line"><a name="l00612"></a><span class="lineno">  612</span>&#160;</div><div class="line"><a name="l00613"></a><span class="lineno">  613</span>&#160;    }</div><div class="line"><a name="l00614"></a><span class="lineno">  614</span>&#160;</div><div class="line"><a name="l00615"></a><span class="lineno">  615</span>&#160;  }</div><div class="line"><a name="l00616"></a><span class="lineno">  616</span>&#160;}</div><div class="line"><a name="l00617"></a><span class="lineno">  617</span>&#160;</div><div class="line"><a name="l00618"></a><span class="lineno">  618</span>&#160;</div><div class="line"><a name="l00619"></a><span class="lineno">  619</span>&#160;<span class="comment">// address must be allocated with MALLOC_CAP_DMA or even an address of another already allocated buffer</span></div><div class="line"><a name="l00620"></a><span class="lineno">  620</span>&#160;<span class="comment">// allocated buffer length (in bytes) must be 32 bit aligned</span></div><div class="line"><a name="l00621"></a><span class="lineno">  621</span>&#160;<span class="comment">// Max length is 4092 bytes</span></div><div class="line"><a name="l00622"></a><span class="lineno">  622</span>&#160;<span class="keywordtype">void</span> VGABaseController::setDMABufferBlank(<span class="keywordtype">int</span> index, <span class="keywordtype">void</span> <span class="keyword">volatile</span> * address, <span class="keywordtype">int</span> length, <span class="keywordtype">int</span> scan, <span class="keywordtype">bool</span> isStartOfVertFrontPorch)</div><div class="line"><a name="l00623"></a><span class="lineno">  623</span>&#160;{</div><div class="line"><a name="l00624"></a><span class="lineno">  624</span>&#160;  <span class="keywordtype">int</span> size = (length + 3) &amp; (~3);</div><div class="line"><a name="l00625"></a><span class="lineno">  625</span>&#160;  m_DMABuffers[index].eof    = 0;</div><div class="line"><a name="l00626"></a><span class="lineno">  626</span>&#160;  m_DMABuffers[index].size   = size;</div><div class="line"><a name="l00627"></a><span class="lineno">  627</span>&#160;  m_DMABuffers[index].length = length;</div><div class="line"><a name="l00628"></a><span class="lineno">  628</span>&#160;  m_DMABuffers[index].buf    = (uint8_t*) address;</div><div class="line"><a name="l00629"></a><span class="lineno">  629</span>&#160;  onSetupDMABuffer(&amp;m_DMABuffers[index], isStartOfVertFrontPorch, scan, <span class="keyword">false</span>, 0);</div><div class="line"><a name="l00630"></a><span class="lineno">  630</span>&#160;  <span class="keywordflow">if</span> (m_doubleBufferOverDMA &amp;&amp; isDoubleBuffered()) {</div><div class="line"><a name="l00631"></a><span class="lineno">  631</span>&#160;    m_DMABuffersVisible[index].eof    = 0;</div><div class="line"><a name="l00632"></a><span class="lineno">  632</span>&#160;    m_DMABuffersVisible[index].size   = size;</div><div class="line"><a name="l00633"></a><span class="lineno">  633</span>&#160;    m_DMABuffersVisible[index].length = length;</div><div class="line"><a name="l00634"></a><span class="lineno">  634</span>&#160;    m_DMABuffersVisible[index].buf    = (uint8_t*) address;</div><div class="line"><a name="l00635"></a><span class="lineno">  635</span>&#160;    onSetupDMABuffer(&amp;m_DMABuffersVisible[index], isStartOfVertFrontPorch, scan, <span class="keyword">false</span>, 0);</div><div class="line"><a name="l00636"></a><span class="lineno">  636</span>&#160;  }</div><div class="line"><a name="l00637"></a><span class="lineno">  637</span>&#160;}</div><div class="line"><a name="l00638"></a><span class="lineno">  638</span>&#160;</div><div class="line"><a name="l00639"></a><span class="lineno">  639</span>&#160;</div><div class="line"><a name="l00640"></a><span class="lineno">  640</span>&#160;<span class="keywordtype">bool</span> VGABaseController::isMultiScanBlackLine(<span class="keywordtype">int</span> scan)</div><div class="line"><a name="l00641"></a><span class="lineno">  641</span>&#160;{</div><div class="line"><a name="l00642"></a><span class="lineno">  642</span>&#160;  <span class="keywordflow">return</span> (scan &gt; 0 &amp;&amp; m_timings.multiScanBlack == 1 &amp;&amp; m_timings.HStartingBlock == <a class="code" href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632a3fe66d1dbf572a4f40096a3780f5f5cd">FrontPorch</a>);</div><div class="line"><a name="l00643"></a><span class="lineno">  643</span>&#160;}</div><div class="line"><a name="l00644"></a><span class="lineno">  644</span>&#160;</div><div class="line"><a name="l00645"></a><span class="lineno">  645</span>&#160;</div><div class="line"><a name="l00646"></a><span class="lineno">  646</span>&#160;<span class="comment">// address must be allocated with MALLOC_CAP_DMA or even an address of another already allocated buffer</span></div><div class="line"><a name="l00647"></a><span class="lineno">  647</span>&#160;<span class="comment">// allocated buffer length (in bytes) must be 32 bit aligned</span></div><div class="line"><a name="l00648"></a><span class="lineno">  648</span>&#160;<span class="comment">// Max length is 4092 bytes</span></div><div class="line"><a name="l00649"></a><span class="lineno">  649</span>&#160;<span class="keywordtype">void</span> VGABaseController::setDMABufferView(<span class="keywordtype">int</span> index, <span class="keywordtype">int</span> row, <span class="keywordtype">int</span> scan, <span class="keyword">volatile</span> uint8_t * * viewPort, <span class="keywordtype">bool</span> onVisibleDMA)</div><div class="line"><a name="l00650"></a><span class="lineno">  650</span>&#160;{</div><div class="line"><a name="l00651"></a><span class="lineno">  651</span>&#160;  uint8_t * bufferPtr = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00652"></a><span class="lineno">  652</span>&#160;  <span class="keywordflow">if</span> (isMultiScanBlackLine(scan))</div><div class="line"><a name="l00653"></a><span class="lineno">  653</span>&#160;    bufferPtr = (uint8_t *) (m_HBlankLine + m_HLineSize - m_timings.HVisibleArea);  <span class="comment">// this works only when HSYNC, FrontPorch and BackPorch are at the beginning of m_HBlankLine</span></div><div class="line"><a name="l00654"></a><span class="lineno">  654</span>&#160;  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (viewPort)</div><div class="line"><a name="l00655"></a><span class="lineno">  655</span>&#160;    bufferPtr = (uint8_t *) viewPort[row];</div><div class="line"><a name="l00656"></a><span class="lineno">  656</span>&#160;  lldesc_t <span class="keyword">volatile</span> * DMABuffers = onVisibleDMA ? m_DMABuffersVisible : m_DMABuffers;</div><div class="line"><a name="l00657"></a><span class="lineno">  657</span>&#160;  DMABuffers[index].size   = (m_viewPortWidth + 3) &amp; (~3);</div><div class="line"><a name="l00658"></a><span class="lineno">  658</span>&#160;  DMABuffers[index].length = m_viewPortWidth;</div><div class="line"><a name="l00659"></a><span class="lineno">  659</span>&#160;  DMABuffers[index].buf    = bufferPtr;</div><div class="line"><a name="l00660"></a><span class="lineno">  660</span>&#160;}</div><div class="line"><a name="l00661"></a><span class="lineno">  661</span>&#160;</div><div class="line"><a name="l00662"></a><span class="lineno">  662</span>&#160;</div><div class="line"><a name="l00663"></a><span class="lineno">  663</span>&#160;<span class="comment">// address must be allocated with MALLOC_CAP_DMA or even an address of another already allocated buffer</span></div><div class="line"><a name="l00664"></a><span class="lineno">  664</span>&#160;<span class="comment">// allocated buffer length (in bytes) must be 32 bit aligned</span></div><div class="line"><a name="l00665"></a><span class="lineno">  665</span>&#160;<span class="comment">// Max length is 4092 bytes</span></div><div class="line"><a name="l00666"></a><span class="lineno">  666</span>&#160;<span class="keywordtype">void</span> VGABaseController::setDMABufferView(<span class="keywordtype">int</span> index, <span class="keywordtype">int</span> row, <span class="keywordtype">int</span> scan, <span class="keywordtype">bool</span> isStartOfVertFrontPorch)</div><div class="line"><a name="l00667"></a><span class="lineno">  667</span>&#160;{</div><div class="line"><a name="l00668"></a><span class="lineno">  668</span>&#160;  setDMABufferView(index, row, scan, m_viewPort, <span class="keyword">false</span>);</div><div class="line"><a name="l00669"></a><span class="lineno">  669</span>&#160;  <span class="keywordflow">if</span> (!isMultiScanBlackLine(scan))</div><div class="line"><a name="l00670"></a><span class="lineno">  670</span>&#160;    onSetupDMABuffer(&amp;m_DMABuffers[index], isStartOfVertFrontPorch, scan, <span class="keyword">true</span>, row);</div><div class="line"><a name="l00671"></a><span class="lineno">  671</span>&#160;  <span class="keywordflow">if</span> (isDoubleBuffered()) {</div><div class="line"><a name="l00672"></a><span class="lineno">  672</span>&#160;    setDMABufferView(index, row, scan, m_viewPortVisible, <span class="keyword">true</span>);</div><div class="line"><a name="l00673"></a><span class="lineno">  673</span>&#160;    <span class="keywordflow">if</span> (!isMultiScanBlackLine(scan))</div><div class="line"><a name="l00674"></a><span class="lineno">  674</span>&#160;      onSetupDMABuffer(&amp;m_DMABuffersVisible[index], isStartOfVertFrontPorch, scan, <span class="keyword">true</span>, row);</div><div class="line"><a name="l00675"></a><span class="lineno">  675</span>&#160;  }</div><div class="line"><a name="l00676"></a><span class="lineno">  676</span>&#160;}</div><div class="line"><a name="l00677"></a><span class="lineno">  677</span>&#160;</div><div class="line"><a name="l00678"></a><span class="lineno">  678</span>&#160;</div><div class="line"><a name="l00679"></a><span class="lineno">  679</span>&#160;<span class="keywordtype">void</span> <span class="keyword">volatile</span> * VGABaseController::getDMABuffer(<span class="keywordtype">int</span> index, <span class="keywordtype">int</span> * length)</div><div class="line"><a name="l00680"></a><span class="lineno">  680</span>&#160;{</div><div class="line"><a name="l00681"></a><span class="lineno">  681</span>&#160;  *length = m_DMABuffers[index].length;</div><div class="line"><a name="l00682"></a><span class="lineno">  682</span>&#160;  <span class="keywordflow">return</span> m_DMABuffers[index].buf;</div><div class="line"><a name="l00683"></a><span class="lineno">  683</span>&#160;}</div><div class="line"><a name="l00684"></a><span class="lineno">  684</span>&#160;</div><div class="line"><a name="l00685"></a><span class="lineno">  685</span>&#160;</div><div class="line"><a name="l00686"></a><span class="lineno">  686</span>&#160;<span class="comment">// buffer: buffer to fill (buffer size must be 32 bit aligned)</span></div><div class="line"><a name="l00687"></a><span class="lineno">  687</span>&#160;<span class="comment">// startPos: initial position (in pixels)</span></div><div class="line"><a name="l00688"></a><span class="lineno">  688</span>&#160;<span class="comment">// length: number of pixels to fill</span></div><div class="line"><a name="l00689"></a><span class="lineno">  689</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00690"></a><span class="lineno">  690</span>&#160;<span class="comment">// Returns next pos to fill (startPos + length)</span></div><div class="line"><a name="l00691"></a><span class="lineno">  691</span>&#160;<span class="keywordtype">int</span> VGABaseController::fill(uint8_t <span class="keyword">volatile</span> * buffer, <span class="keywordtype">int</span> startPos, <span class="keywordtype">int</span> length, uint8_t red, uint8_t green, uint8_t blue, <span class="keywordtype">bool</span> HSync, <span class="keywordtype">bool</span> VSync)</div><div class="line"><a name="l00692"></a><span class="lineno">  692</span>&#160;{</div><div class="line"><a name="l00693"></a><span class="lineno">  693</span>&#160;  uint8_t pattern = preparePixelWithSync((RGB222){red, green, blue}, HSync, VSync);</div><div class="line"><a name="l00694"></a><span class="lineno">  694</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; length; ++i, ++startPos)</div><div class="line"><a name="l00695"></a><span class="lineno">  695</span>&#160;    VGA_PIXELINROW(buffer, startPos) = pattern;</div><div class="line"><a name="l00696"></a><span class="lineno">  696</span>&#160;  <span class="keywordflow">return</span> startPos;</div><div class="line"><a name="l00697"></a><span class="lineno">  697</span>&#160;}</div><div class="line"><a name="l00698"></a><span class="lineno">  698</span>&#160;</div><div class="line"><a name="l00699"></a><span class="lineno">  699</span>&#160;</div><div class="line"><a name="l00700"></a><span class="lineno">  700</span>&#160;<span class="keywordtype">void</span> VGABaseController::moveScreen(<span class="keywordtype">int</span> offsetX, <span class="keywordtype">int</span> offsetY)</div><div class="line"><a name="l00701"></a><span class="lineno">  701</span>&#160;{</div><div class="line"><a name="l00702"></a><span class="lineno">  702</span>&#160;  suspendBackgroundPrimitiveExecution();</div><div class="line"><a name="l00703"></a><span class="lineno">  703</span>&#160;  fillVertBuffers(offsetY);</div><div class="line"><a name="l00704"></a><span class="lineno">  704</span>&#160;  fillHorizBuffers(offsetX);</div><div class="line"><a name="l00705"></a><span class="lineno">  705</span>&#160;  resumeBackgroundPrimitiveExecution();</div><div class="line"><a name="l00706"></a><span class="lineno">  706</span>&#160;}</div><div class="line"><a name="l00707"></a><span class="lineno">  707</span>&#160;</div><div class="line"><a name="l00708"></a><span class="lineno">  708</span>&#160;</div><div class="line"><a name="l00709"></a><span class="lineno">  709</span>&#160;<span class="keywordtype">void</span> VGABaseController::shrinkScreen(<span class="keywordtype">int</span> shrinkX, <span class="keywordtype">int</span> shrinkY)</div><div class="line"><a name="l00710"></a><span class="lineno">  710</span>&#160;{</div><div class="line"><a name="l00711"></a><span class="lineno">  711</span>&#160;  VGATimings * currTimings = getResolutionTimings();</div><div class="line"><a name="l00712"></a><span class="lineno">  712</span>&#160;</div><div class="line"><a name="l00713"></a><span class="lineno">  713</span>&#160;  currTimings-&gt;HBackPorch  = tmax(currTimings-&gt;HBackPorch + 4 * shrinkX, 4);</div><div class="line"><a name="l00714"></a><span class="lineno">  714</span>&#160;  currTimings-&gt;HFrontPorch = tmax(currTimings-&gt;HFrontPorch + 4 * shrinkX, 4);</div><div class="line"><a name="l00715"></a><span class="lineno">  715</span>&#160;</div><div class="line"><a name="l00716"></a><span class="lineno">  716</span>&#160;  currTimings-&gt;VBackPorch  = tmax(currTimings-&gt;VBackPorch + shrinkY, 1);</div><div class="line"><a name="l00717"></a><span class="lineno">  717</span>&#160;  currTimings-&gt;VFrontPorch = tmax(currTimings-&gt;VFrontPorch + shrinkY, 1);</div><div class="line"><a name="l00718"></a><span class="lineno">  718</span>&#160;</div><div class="line"><a name="l00719"></a><span class="lineno">  719</span>&#160;  setResolution(*currTimings, m_viewPortWidth, m_viewPortHeight, isDoubleBuffered());</div><div class="line"><a name="l00720"></a><span class="lineno">  720</span>&#160;}</div><div class="line"><a name="l00721"></a><span class="lineno">  721</span>&#160;</div><div class="line"><a name="l00722"></a><span class="lineno">  722</span>&#160;</div><div class="line"><a name="l00723"></a><span class="lineno">  723</span>&#160;<span class="keywordtype">void</span> IRAM_ATTR VGABaseController::swapBuffers()</div><div class="line"><a name="l00724"></a><span class="lineno">  724</span>&#160;{</div><div class="line"><a name="l00725"></a><span class="lineno">  725</span>&#160;  tswap(m_viewPort, m_viewPortVisible);</div><div class="line"><a name="l00726"></a><span class="lineno">  726</span>&#160;  <span class="keywordflow">if</span> (m_doubleBufferOverDMA) {</div><div class="line"><a name="l00727"></a><span class="lineno">  727</span>&#160;    tswap(m_DMABuffers, m_DMABuffersVisible);</div><div class="line"><a name="l00728"></a><span class="lineno">  728</span>&#160;    m_DMABuffersHead-&gt;qe.stqe_next = (lldesc_t*) &amp;m_DMABuffersVisible[0];</div><div class="line"><a name="l00729"></a><span class="lineno">  729</span>&#160;  }</div><div class="line"><a name="l00730"></a><span class="lineno">  730</span>&#160;}</div><div class="line"><a name="l00731"></a><span class="lineno">  731</span>&#160;</div><div class="line"><a name="l00732"></a><span class="lineno">  732</span>&#160;</div><div class="line"><a name="l00733"></a><span class="lineno">  733</span>&#160;</div><div class="line"><a name="l00734"></a><span class="lineno">  734</span>&#160;</div><div class="line"><a name="l00735"></a><span class="lineno">  735</span>&#160;} <span class="comment">// end of namespace</span></div><div class="line"><a name="l00736"></a><span class="lineno">  736</span>&#160;</div><div class="line"><a name="l00737"></a><span class="lineno">  737</span>&#160;</div><div class="ttc" id="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632_html_ggac2082e5f1e16f3780b8e7d796ea10632ad37a59f433488f345c4201a061f088e6"><div class="ttname"><a href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632ad37a59f433488f345c4201a061f088e6">fabgl::VisibleArea</a></div><div class="ttdef"><b>Definition:</b> <a href="vgabasecontroller_8h_source.html#l00085">vgabasecontroller.h:85</a></div></div>
<div class="ttc" id="vgabasecontroller_8h_html"><div class="ttname"><a href="vgabasecontroller_8h.html">vgabasecontroller.h</a></div><div class="ttdoc">This file contains fabgl::VGABaseController definition. </div></div>
<div class="ttc" id="swgenerator_8h_html"><div class="ttname"><a href="swgenerator_8h.html">swgenerator.h</a></div><div class="ttdoc">This file contains fabgl::GPIOStream definition. </div></div>
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<div class="ttc" id="namespacefabgl_html"><div class="ttname"><a href="namespacefabgl.html">fabgl</a></div><div class="ttdef"><b>Definition:</b> <a href="canvas_8cpp_source.html#l00031">canvas.cpp:31</a></div></div>
<div class="ttc" id="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632_html_ggac2082e5f1e16f3780b8e7d796ea10632aa1c3e25967ce8edc4bf943ae05fa7af9"><div class="ttname"><a href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632aa1c3e25967ce8edc4bf943ae05fa7af9">fabgl::Sync</a></div><div class="ttdef"><b>Definition:</b> <a href="vgabasecontroller_8h_source.html#l00083">vgabasecontroller.h:83</a></div></div>
<div class="ttc" id="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632_html_ggac2082e5f1e16f3780b8e7d796ea10632a3fe66d1dbf572a4f40096a3780f5f5cd"><div class="ttname"><a href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632a3fe66d1dbf572a4f40096a3780f5f5cd">fabgl::FrontPorch</a></div><div class="ttdef"><b>Definition:</b> <a href="vgabasecontroller_8h_source.html#l00082">vgabasecontroller.h:82</a></div></div>
<div class="ttc" id="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632_html_ggac2082e5f1e16f3780b8e7d796ea10632ad5f83b0219ea6b63db4fedab582a2da5"><div class="ttname"><a href="group___enumerations_gac2082e5f1e16f3780b8e7d796ea10632.html#ggac2082e5f1e16f3780b8e7d796ea10632ad5f83b0219ea6b63db4fedab582a2da5">fabgl::BackPorch</a></div><div class="ttdef"><b>Definition:</b> <a href="vgabasecontroller_8h_source.html#l00084">vgabasecontroller.h:84</a></div></div>
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